My dear friends, really thankssss!!! you helped me so much!:)

I think the sentence is saying something like : "you understand me so well!" or "you are very kind to me" or "you treat me well"... 贴心 means understanding or knowing someone very well. It can also mean close or intimate. Or it can mean a person who understands you well enough to do something for you without you asking them to do it. For example you understand your friend very well. You know she always forgets to bring her food so you brought food for her. And she will say : "你太贴心了!" Hopefully my explanation will help you :) if I'm wrong please feel free to correct me.

considerate She is so kind to read the letter for that illiterate widow.

I think it means u r very sweet and considerable for you friends.

it's an adjective in this sentence and it similarly means "kind" or "considerate". Therefore the whole sentence means"you're very kind" or "you're very considerate" in English.